Research on Advanced Detection Technology of Acoustic Wave in 20107 Upper Roadway of Desheng Coal Mine
Mistakenly uncovering water-conducting structure is one of the main causes of water inrush accidents.In this paper,the geological conditions and acoustic advanced technology of 20107 working face are analyzed.It is considered that the acoustic wave can be used to detect the development of geological structure in front of the excavation head of 20107 upper crossheading.The advanced ultrasonic detection is carried out at 180 m of the crossheading of 20107 upper crossheading,and a weak reflection interface area is delineated in the section of 94～102 m in front of the excavation head(i.e.,274～282 m of the crossheading).Combined with the geological data exposed by the adjacent 20106 working face and the two exploration and verification boreholes constructed at 240 m of the crossheading of 20107 upper crossheading.It is determined that the abnormal area is the extension of 2F22 fault in the range of 20107 working face,and it is rich in water,which provides a basis for the implementation of acoustic advanced detection of geological abnormal areas in other areas and the guidance of mine safety production.
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